Natural wonders of the Mekong River The amazing natural phenomenon Recently been discovered in the northeast. Along the river was a large fine sand-like crystals with curved serpent slithering through the flick. Is shown clearly in the village of Sai District mouth ginseng social offense. Become Perak Roddenberry Talk of The Town for tourists and solution of a puzzle. Indeed, caused waves in the river. Borne out sand and silt was deposited at this point.